NFC: Fix the number of pipes

[mirror_ubuntu-bionic-kernel.git] / include / net / ip_tunnels.h

diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h
index 24628f6b09bf9d7b4186152c49ed4e96e5329756..e4bccf9f0147a0bfa833bf5c240dc0c146e49fbf 100644 (file)
--- a/include/net/ip_tunnels.h
+++ b/include/net/ip_tunnels.h
@@ -100,6 +100,28 @@ struct ip_tunnel_prl_entry {
 };
 
 struct metadata_dst;
+/* A fan overlay /8 (250.0.0.0/8, for example) maps to exactly one /16
+ * underlay (10.88.0.0/16, for example).  Multiple local addresses within
+ * the /16 may be used, but a particular overlay may not span
+ * multiple underlay subnets.
+ *
+ * We store one underlay, indexed by the overlay's high order octet.
+ */
+#define FAN_OVERLAY_CNT                256
+
+struct ip_fan_map {
+       __be32                  underlay;
+       __be32                  overlay;
+       u16                     underlay_prefix;
+       u16                     overlay_prefix;
+       u32                     overlay_mask;
+       struct list_head        list;
+       struct rcu_head         rcu;
+};
+
+struct ip_tunnel_fan {
+       struct list_head        fan_maps;
+};
 
 struct ip_tunnel {
        struct ip_tunnel __rcu  *next;
@@ -134,6 +156,7 @@ struct ip_tunnel {
 #endif
        struct ip_tunnel_prl_entry __rcu *prl;  /* potential router list */
        unsigned int            prl_count;      /* # of entries in PRL */
+       struct ip_tunnel_fan    fan;
        unsigned int            ip_tnl_net_id;
        struct gro_cells        gro_cells;
        __u32                   fwmark;
@@ -160,6 +183,11 @@ struct ip_tunnel {
 #define TUNNEL_OPTIONS_PRESENT \
                (TUNNEL_GENEVE_OPT | TUNNEL_VXLAN_OPT | TUNNEL_ERSPAN_OPT)
 
+static inline int fan_has_map(const struct ip_tunnel_fan *fan)
+{
+       return !list_empty(&fan->fan_maps);
+}
+
 struct tnl_ptk_info {
        __be16 flags;
        __be16 proto;